automatic electronic microprocessor based sample polishing machine with a fifty method memory providing up to six steps per method and six preinstalled methods for laboratory use comprising a fully automatic sample preparation system including a plurality of platens arranged for automatic selective use seriatim for polishing metallographic and ceramographic test samples to prepare them for microstructural analysis and up to forty-four different user derived methods for sample preparation stored electronically for retrieval and subsequent use but not for use as an abrasive tool or grinding wheel